DE2740261C2 - Device for applying an electrically charged flocking material - Google Patents

Description

35

25th

The invention relates to a device for applying an electrically charged flocking material, with a metering system, which consists of at least one chamber, a chamber bottom with a metering screen and a metering brush arranged inside the chamber, _M rotating and interacting with the metering screen Chamber bottom u ^p d the frame of the dosing screen are adapted to the radius of the dosing brush and the bristles of the dosing brush that interact with the dosing screen have a steep brush position.

As the state of the art, berc.s is such Device known (magazine "Flock", January 1977, page 10). For surface flocking, find here Basically two machine types Application: One-time machines with metering systems carrying earth potential and flock charging through ionization Intermediate electrodes and also high-voltage dosing systems. This latter system points the disadvantage that there is no possibility of the pressure of the brushes against the sieve bottom of the Chamber infinitely adjustable in order to match the characteristics of the different doses Adjust materials. Furthermore, unwanted flock agglomeration cannot be avoided. the. There is also an undesirable change in the contact pressure of the bristles of the paddle brushes the sieve, which results in a change in the dosing behavior.

Furthermore, there are unreachable free spaces in the lower corners of the brush radius Chamber.

The state of the art continues to include one Dosing device for electrostatic flocking devices with a dosing system carrying earth potential stem (DE-AS 23 08 422). In this known construction, the chamber bottom is arched and consists of expanded metal with sharp-edged bars against which the bristles of the paddle brush brush. This results in the disadvantage of rapid wear of the bristles of the paddle brush, again none Adaptation to the characteristics of the different materials to be dosed is possible.

The object of the present invention is now to design a device of the type mentioned at the outset in such a way that that the brush wear can be compensated and a stepless adjustment of the contact pressure of the Brushing against the sieve bottom of the chamber enables even flocking of the material is guaranteed.

According to the invention, this object is achieved by that the chamber floor can be moved vertically.

This has the advantage that undesirable free spaces in the lower corners of the chamber can be avoided, with a vertically movable chamber bottom, which ensures better adaptation to the different materials to be processed and also the wear and tear of the Bristles of the brush is largely reduced. The lowerable chamber floor also advantageously opens fine flakes with a high degree of slimness

In a further embodiment of the invention, on each side of the chamber bottom two wedge-shaped elements can be arranged one behind the other, which are vertically movable independently of one another or at the same time.

This arrangement of the wedges has the advantage that the contact pressure of the brush against the screen is continuously variable can be regulated and that independently of this, the contact pressure above the screen can be varied in the upper part. This also allows the to Processing skirt can be loosened up in a special way.

The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing described. In the drawing shows

F i g. 1 shows a schematic side view of an apparatus for flocking a material;

F i g. 2 shows another embodiment of the device according to the invention in a schematic side view.

In Fig. 1 only a chamber 1 of a flocking machine for electrical flocking of Flat structures or surface-like parts shown. In general, the Be! -backing machines a number of chambers 1 arranged one behind the other.

Within the chamber 1, a rotating dosing brush 2 is arranged, the bristles 15 with a In the chamber bottom 3 mounted dosing screen 5 cooperate. The dosing sieve 5 is over a sieve frame 4 attached to the chamber floor 3 with covering. As can be seen, the chamber shape, the chamber bottom 3 and the frame 4 of the dosing sieve 5 is adapted to the radius 13 of the dosing brush 2. For this are in the lower Area of wedge-shaped elements 30 and 30 'and 34 and 34' are provided. The wedge-shaped elements 30 and 30 ' are attached to the chamber floor 3 in the area of the sieve frame 4.

The chamber floor 3 is attached to side walls 32 and 32 'via adjustable intermediate elements 10 and 10' appropriate. These side walls 32 and 32 'have the wedge-shaped elements 34 and 34' in the lower area which are also adapted to the radius 13 of the rotating dosing brush 2.

The two side walls 32 and 32 'each have a gear 9 or 9' in the upper area.

Two opposing walls 31 and 3Γ the chamber 1 are each provided with a vertically arranged rack 7 and 7 ', in which the two aforementioned gears 9 and 9 'engage. Both gears 9 and 9 ′ are connected via a chain drive 11

connected with each other. The gear wheel 9 is controlled by a hand wheel 8, which is also attached to the side wall 32 is stored, actuated

If the handwheel 8 is rotated, the two gearwheels 9 and 9 'move with respect to the stationary ones Racks 7 and 7 ', so that thereby the two side walls 32 and 32' and the chamber bottom 3, the Sieve frame 4 and the sieve 5 are moved vertically.

Since the two wedge-shaped elements 30 and 30 'in the area of the Sifibrahmens 4 are not directly connected to the: o Side walls 32 and 32 'are connected, but an intermediate connection in the form of adjustable intermediate elements 10 and 10 ', in addition to the aforementioned horizontal adjustment, it is also possible a fine adjustment of the chamber bottom 3, the sieve frame 4 and the sieve 5 as well as the two wedge-shaped Provide elements 30 and 30 '. The two adjustable intermediate elements 10 and 10 'can each have one Be threaded sleeve, which work together with a threaded rod 33 or 33 '. In the lower area you can the adjustable intermediate elements 10 and 10 'via a detachable connection 6 or 6' with the chamber floor 3 be connected.

With regard to the design of the chamber bottom surface, it is possible that the support 16 of the chamber bottom surface according to FIG. 1 is seamlessly polished to a high gloss. This results in a smooth chamber bottom surface and a homogeneous field.

Due to the two aforementioned adjustment options, an adaptation 14 of the shape of the chamber 1, the chamber bottom 3 and the sieve frame 4 and the sieve 5 to the brush radius 13 of the circumferential Dosing brush 2 can be effected. This adaptation is optimal due to the various adjustment options.

In Fig. 2 shows another embodiment of the invention in a schematic side view. Here are two wedge-shaped elements 340 and 31 in the lower area on the two chamber walls 31 340 'arranged stationary. Two further wedge elements 300 and 300' are located in the area of the dosing sieve 5 with the Chamber bottom 3 connected. This chamber bottom 3 is via adjustable intermediate elements 100 and 100 'and each an intermediate part connected to the rack 77 or 77 '.

As can be seen, the rack 77 or, 77 'is mounted in the bearing 50 or 50' so that it can move vertically, with the the two aforementioned bearings are arranged on the chamber bottom walls 31. The intermediate part 40 or 40 'iät also mounted vertically movable in a bearing 45 or 45 'The two aforementioned bearings 45 and 45' are fixedly arranged on the chamber walls 31

In the two racks 77 and 77 ', two gearwheels 9 and 9' which are fixedly mounted in the chamber wall engage. Both gears 9 and 9 'can be operated via a handwheel 8 and connected to one another by a chain 11 tied together. If the gearwheel 9 is now rotated via the handwheel 8 and the gearwheel 9 'is rotated via the chain 11, then the racks 77 and 77 'moved vertically, the chamber bottom via the intermediate parts 40 and 40' and via the adjustable intermediate elements 100 and 100 ' 3 is also moved vertically. The adjustable intermediate elements 100 and 100 'here have the Function of adjustment and adaptation of the sieve as well as the two connected to the chamber floor, wedge-shaped elements 300 and 300 ′ on the radius 13 of the dosing brush 12.

In the embodiment according to FIG. 2 applies to the embodiment of FIG. 1, the difference that according to Figure 2, the two wedge-shaped elements 3fl0 and 300 ', which are connected to the chamber bottom 3, can be moved vertically via the lifting device with the two racks 77 and 77 'and the two gears 9 and 9' and the two adjustable Intermediate elements 100 and 100 '. The other two, wedge-shaped elements 340 and 340 'are fixed connected to the two opposing chamber walls 31 and thus cannot be adjusted will. In this case, too, there is advantageously a good adaptation of the individual elements the radius of the dispensing brush as well as an optimal processing option.

The device according to the invention with the doctor beam, the wedge-shaped elements and the adjustment at least one wedge-shaped pair of elements on the radius of the dosing brush is also used in machines Dosing systems carrying earth potential and flock charging through ionization through intermediate electrodes applicable.

For this purpose 2 sheets of drawings

Claims (2)

Patent claims: 1. Apparatus for applying an electrically charged flocking material, with a dosing system, which consists of at least one chamber, a chamber bottom with a dosing screen and a rotating dosing brush arranged within the chamber, cooperating with the dosing screen, the shape of the chamber, the chamber bottom and the frame of the Dosiersiebes are adapted to the radius _of) the dosing brush ₀ and cooperating with the dosing strainer bristles of the dosing brush having a brush steep position, characterized in that the chamber base (3) vertically movable isi. , 2. Apparatus according to claim 1, characterized in that on each side of the chamber bottom two wedge-shaped elements (30, 30 ', 34, 34'; 300, 300 ', 340, 340') arranged one behind the other are arranged, which are independently or at the same time vertically movable.